Publication

Application

Priority

IT TO970573 A 19970701

Abstract (en)

[origin: EP0888789A1] The sterile filtering system has a hydrophobic membrane (15) which covers the air inlet or outlet into the first filter chamber, and a hydrophobic membrane (17) covers the air inlet or outlet at the second filter chamber. A mechanism (20) opens and closes the second air inlet or outlet. The first and second air inlets or outlets are in a collapsible vessel (18). Also claimed is a filtering operation where the fluid is passed through an initial collection channel into the first chamber of the vessel, divided by a filter into two chambers for the fluid to flow from the first chamber into the second through the filter. The outflow channel for the filtered fluid has a closure, and any air in the system can be forced out through hydrophobic membranes by the collapsible vessel. The closure is opened, to allow the filtered fluid to flow out. After filtering, collected air in the system is returned to the vessel to ensure it is emptied.